scholarly journals Diversity of parasitoid Hymenoptera in banana germplasm plantation Yogyakarta

2019 ◽  
Vol 23 (1) ◽  
pp. 26
Author(s):  
Ichsan Luqmana Indra Putra
Keyword(s):  
Sampling Method ◽  
Sampling Methods ◽  
Direct Method ◽  
Wiener Index ◽  
Sampling Point ◽  
Sampling Points ◽  
Index Value ◽  
Number Of Individuals ◽  
Pan Traps

Banana is one of the fruits in Indonesia. The development of its production in Indonesia has increased. However, there are several factors that can reduce the production, one of which is pests. Pests on bananas can be controlled with natural enemies, one of which is parasitoid. The study aimed to calculate the diversity and abundance of parasitoids in the Yogyakarta banana germplasm plantation. The research was carried out in an area of approximately 2 Ha from April to June 2018 with sampling taken once a week. Sampling method used was in the form of transect. The determination of the transect point is determined as far as 500m between sampling points. At each sampling point carried out 2 sampling methods. Direct method by taking pests on 3 banana plants at each point and indirect with insect net and yellow pan traps. The results found that Shannon-Wiener Index value was 3.29. 22 Hymenoptera parasitoid families were found with the highest morphospecies were superfamily Chalcidoidea and the highest number of individuals were Scelionidae.

scholarly journals Kelimpahan Dan Keanekaragaman Jenis Ikan di Perairan Ndalir Kabupaten Merauke, Papua

2021 ◽  
Vol 1 (2) ◽  
pp. 33-42
Author(s):  
Dandi Saleky ◽  
Efraim Weremba ◽  
Marius A. Welikken
Keyword(s):  
Relative Abundance ◽  
Fish Species ◽  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Research Data ◽  
Dominance Index ◽  
Sampling Points ◽  
Index Value

This study aims to analyze the diversity of fish species caught on the Ndalir Coast of Merauke Regency. This research was conducted in Juli-August 2020. The determination of the sampling points at the research location used the purposive random sampling method with two observation stations. Analysis of the research data using relative abundance (Kr), Shannon-Wienner index (H '), uniformity index (E), and dominance index (C), The number of fish catches during the study time was 431 which were divided into 12 species of fish. Station two has a greater number of catches than station one. The highest relative abundance was tongue fish (Cynoglossus abbreviation) (Station I) and mullet (Mugil cephalus) (Station II). The diversity index value at the two observation stations is in the medium category. The uniformity and dominance index values ​​show that the species at the two research stations are evenly distributed with no dominating species.

Diptera (Dryomyzidae, Fanniidae, Muscidae, Piophilidae) Associated With Pig Carcasses in a Forest Habitat of Poland: Sex-Related Patterns of Visitation and Effectiveness of Sampling Methods

2022 ◽  
Author(s):  
Daria Bajerlein ◽  
Mateusz Jarmusz ◽  
Aleksandra Gregor ◽  
Andrzej Grzywacz
Keyword(s):  
Forensic Entomology ◽  
Sampling Method ◽  
Sampling Methods ◽  
Sex Ratios ◽  
Pitfall Traps ◽  
Appearance Time ◽  
Long Time ◽  
Pig Carcasses ◽  
Number Of Individuals

Abstract Our knowledge on many necrophilous dipterans was limited for a long time mainly due to taxonomic issues. Therefore, findings on the sex-related associations with pig carcasses in Dryomyzidae, Fanniidae, Muscidae, and Piophilidae are presented. Moreover, the effectiveness of pitfall traps and sweep nets in fly sampling were compared, since the correct method of collecting insects is critical for the development and application of entomological tools for forensic purposes. The trapped numbers of all species differed significantly in respect to both sexes. The sex ratios were strongly female-biased in most species of Muscidae and in Fanniidae. More females were also collected in Piophilidae, but the proportion of males was higher when compared to muscids. Within Dryomyzidae, the sex ratio differed according to species. Only Dryomyza flaveola (Fabricius, 1794) (Diptera: Dryomyzidae) and Muscina pascuorum (Meigen, 1826) (Diptera: Muscidae) had male-biased sex ratios. Differences in residency patterns between sexes in Stearibia nigriceps (Meigen, 1826) (Diptera: Piophilidae), Liopiophila varipes (Meigen, 1830) (Diptera: Piophilidae), and D. flaveola were statistically insignificant. All studied species were recorded for each sampling method. The effect of the sampling method on the number of individuals was statistically significant for all dipterans but Piophilidae. Pitfall traps outcompeted the aerial sweep net in representing Dryomyzidae and Muscidae, whereas both methods were almost equally effective in the collection of Piophilidae. A varied effectiveness of sampling methods was observed in Fanniidae. The sampling method significantly affected the determination of the appearance time of flies on carcasses, but the effect of species and sampling method was insignificant. Implications for forensic entomology are discussed.

scholarly journals Analisis Hubungan Kelimpahan Plankton di Permukaan Terhadap Hasil Tangkapan Ikan Lemuru (Sardinella lemuru) di Selat Bali

2017 ◽  
Vol 4 (1) ◽  
pp. 151
Author(s):  
Hasanuddin Parulian Sihombing ◽  
I Gede Hendrawan ◽  
Yulianto Suteja
Keyword(s):  
Sampling Method ◽  
Strong Relationship ◽  
Zooplankton Abundance ◽  
Sampling Point ◽  
Water Sampling ◽  
Phytoplankton Abundance ◽  
Fish Food ◽  
Area Sampling ◽  
The Relationship

Lemuru fish is one of fishery commodity that has high economical value and one of fish that most catched by fisherman in Bali Strait. Lemuru fish had been caught in Bali Strait was fluctuating every month and every years. This condition was related with food source of Lemuru fish such as phytoplankton and zooplankton. So this research was conducted to explained the relationship phytoplankton and zooplankton abundance with Lemuru fish catched  in Bali strait. This study focus in Bali strait during March until May 2017. Determination of sampling point used area sampling method while water sampling occured in surface water with pouring method. Total of phytoplankton and zooplankton abundance in Bali strait in March until May had formed the sinusoidal model with their abundance ranged 301 ind/L – 604 ind/L and 7 ind/L – 12 ind/L. Plankton abundance in Bali strait in March until May (transisonal season 1) was categorized low abundance if compared with plankton abundance in another season. The low value of phytoplankton abundance caused by non upwelling phenomenon and grazing process and the low abundance of zooplankton caused by low rate of zooplankton and predation by Lemuru fish. Phytoplankton and zooplankton abundance had  strong relationship with Lemuru fish catched with correlation coefficient value 0.76 and 0.69. This condition caused by phytoplankton and zooplankton are source of Lemuru fish food.

scholarly journals High diversity of bees detected in guarana crop and natural habitat due to the use of combined sampling methods

2021 ◽  
Vol 14 ◽  
pp. e975
Author(s):  
Cristiane Krug ◽  
Juliana Hipólito ◽  
Karine Schoeninger ◽  
Matheus Montefusco ◽  
Flávia Batista Gomes ◽  
...  
Keyword(s):  
Sampling Method ◽  
Sampling Methods ◽  
Natural Habitat ◽  
Native Bees ◽  
Bee Diversity ◽  
Agricultural Plants ◽  
Amazonas State ◽  
Methodological Aspects ◽  
High Diversity ◽  
Pan Traps

Bees are the main pollinators of native and agricultural plants. Identifying and knowing these insects responsible for the environmental service of pollination is essential for the maintenance and management of pollination in agricultural systems, especially in a high diversity biome as the Amazon rainforest. Some crops in this region are dependent of benefited by wild pollinators, especially native plants like guarana. To address methodological aspects of monitoring bee diversity, samplings were carried out in an agricultural environment (guarana crop, Paullinia cupana) surrounded by Amazon natural habitat at Manaus, Amazonas State. We used three combined methods (two passive traps: Malaise and yellow pan-traps, and one active: hand nets) in different periods, with the same number of samplings (12 each). In total, 4,143 native bees belonging to 171 species were sampled; 117 species (1,926 individuals) were collected with Malaise trap, 15 (91 individuals) with pan-traps, and 114 (2,126 individuals) through active sampling. Only seven species were common to all methods, 60 species on two methods and 104 species were unique to one sampling method (50 with Malaise, two with pan-traps, and 52 with hand nets). We reinforce the need for complementary sampling to known bee diversity as the best strategy here was the joint use of active samples and Malaise traps. Recently the concern with Amazon preservation has aroused worldwide interest, a fact that shreds of evidence the need for studies of biodiversity and taxonomy in several areas, since very little is known of this vast region.

scholarly journals A Sequential Optimization Sampling Method for Metamodels with Radial Basis Functions

2014 ◽  
Vol 2014 ◽  
pp. 1-17 ◽  
Author(s):  
Guang Pan ◽  
Pengcheng Ye ◽  
Peng Wang ◽  
Zhidong Yang
Keyword(s):  
Engineering Design ◽  
Density Function ◽  
Sampling Method ◽  
Sampling Methods ◽  
Basis Functions ◽  
Sequential Optimization ◽  
Numerical Examples ◽  
Sampling Points ◽  
Computationally Expensive ◽  
Minimum Points

Metamodels have been widely used in engineering design to facilitate analysis and optimization of complex systems that involve computationally expensive simulation programs. The accuracy of metamodels is strongly affected by the sampling methods. In this paper, a new sequential optimization sampling method is proposed. Based on the new sampling method, metamodels can be constructed repeatedly through the addition of sampling points, namely, extrema points of metamodels and minimum points of density function. Afterwards, the more accurate metamodels would be constructed by the procedure above. The validity and effectiveness of proposed sampling method are examined by studying typical numerical examples.

scholarly journals Bees (Hymenoptera, Apoidea) in an Ecotonal Cerrado-Amazon Region in Brazil

Sociobiology ◽  
2019 ◽  
Vol 66 (3) ◽  
pp. 457
Author(s):  
Rony Peterson Santos Almeida ◽  
Filipe Viegas Arruda ◽  
Daniel Paiva Silva ◽  
Beatriz Woiski Teixeira Coelho
Keyword(s):  
Species Richness ◽  
Sampling Method ◽  
Sampling Methods ◽  
Amazon Region ◽  
The State ◽  
Species Specificity ◽  
Pitfall Traps ◽  
Different Seasons ◽  
Accumulation Curves ◽  
Pan Traps

Little is known about the distribution of organisms in transitional areas, overall because of the lack of understanding regarding each species’ specificity to the diversity of microhabitats found in these areas and effective ways to sample organisms in these regions. Therefore, in this study we aimed to inventory the bee species in a transitional Cerrado-Amazon area in the state of Pará, Brazil, evaluating the effects of three different sampling methods. We used six fragments, sampled in two different seasons with three sampling methods (arboreal pitfalls with urine, scent traps, and pan traps). The specimens were identified and we used accumulation curves to measure the effectiveness of each method. In total, we sampled 68 bee species, where 53 were exclusively from one single sampling method. The pitfall traps were those with reached the highest species richness among all three sampling methods analyzed, followed by the scent traps and pan traps, respectively. Despite the efficiency and generality of the bee groups we found, the pitfall method does not cover specific bee groups as the Euglossini bees, almost exclusively attracted to scent traps. Therefore, we suggest that studies using pitfalls with urine should be performed in other biomes to evaluate the efficiency of this method in future bee surveys.

scholarly journals Determination of the biomass stock in a mixed plantation of Pinus taeda L. and Pinus elliottii Engelm.

2021 ◽  
Vol 8 (2) ◽  
pp. 1455-1462
Author(s):  
Renata Reis de Carvalho ◽  
Jonathan William Trautenmüller ◽  
Sabrina Reis de Carvalho ◽  
Sergio Costa Júnior ◽  
Dimas Agostinho da Silva ◽  
...  
Keyword(s):  
Pinus Taeda ◽  
Biomass Production ◽  
Unit Area ◽  
Direct Method ◽  
Pinus Elliottii ◽  
Diameter Class ◽  
Mixed Plantation ◽  
Pinus Taeda L ◽  
Number Of Individuals

Mixed planting when well managed can be more efficient in the production of biomass and in the use of available resources, thus increasing the profits of planting. The objectives of this research were to quantify the biomass of a mixed plantation of Pinus taeda and Pinus elliottii, by the direct method and to verify the allocation of biomass between the components and the production of biomass per unit area of the mixed plantation and of the two species studied. From the forest census carried out in the mixed planting of 43.5 ha, at 16 years of age, the diametric distribution of the population was generated. Based on the diametric classes, 60 trees were randomly sampled by the direct method, 30 trees for each species. Then, the aerial biomass production in the different components of the tree for both species was evaluated and compared. Mixed planting produced 171.5 t ha-1 of biomass; the shaft represented more than 60% of the biomass. The biomass production in Pinus taeda was superior to Pinus elliottii. The biomass of branches, in turn, was significantly different between species. The stratified tree technique revealed that biomass production in the stand was lower than the biomass obtained by the direct method. In this technique, the biomass (t ha-1) was superior to Pinus elliottii, due to the frequency of individuals in the forest census being higher in the central diameter class, and the species having a larger number of individuals in the stand.

Efficiency of four sampling methods used to detect two common nosocomial pathogens on textiles

2012 ◽  
Vol 82 (20) ◽  
pp. 2099-2105 ◽  
Author(s):  
Urška Rabuza ◽  
Sonja Šostar-Turk ◽  
Sabina Fijan
Keyword(s):  
Sampling Method ◽  
Sampling Methods ◽  
Sampling Technique ◽  
Nondestructive Method ◽  
Plate Method ◽  
Contact Plate ◽  
Elution Method ◽  
And Staphylococcus Aureus ◽  
Quick Determination

Detecting microorganisms on textiles is useful for many purposes, for example to determine the bioburden before laundering, assess the reduction in bacterial counts in connection with various laundry processes, or trace transfer routes in infection control investigations. Therefore a validated, reproducible and rational method is needed. For sampling microorganisms on textile surfaces the most commonly used method is the contact plate method using RODAC plates, first described by Hall and Hartnett followed by the swab sampling technique. Both methods can only capture microorganisms on the surface of the textiles while microorganisms that have penetrated into the deeper structure of the material will not be detected. In our research the contact plate method and the swabbing technique were compared with two wash-off methods. For the first wash-off method the destructive elution method was used, where microorganisms were eluted from the fabrics by shaking the fabrics for a certain time in an elution medium. For the fourth sampling method a nondestructive method that included a compact test device called Morapex® was used, which is based on forced desorption by pressing the microorganisms through the fabric without destroying the fabric. In our research, two types of microorganisms were included ( Klebsiella pneumoniae and Staphylococcus aureus) that cause common nosocomial infections. The aim of this study was to compare the efficiency of the four sampling methods for detecting microorganisms on textiles and to determine the lowest concentration, which can still be detected. The percentage of microorganisms that were detected by both elution methods was substantially higher than by sampling of fabrics with the contact plate method or swabbing. It can be concluded that a nondestructive method using a modified Morapex® device can be applied for quick determination of the hygienic condition of textiles.

scholarly journals PENGARUH PERSEPSI ASAL NEGARA (COUNTRY OF ORIGIN) TERHADAP NIAT BELI YANG DIMEDIASI CITRA MEREK

2019 ◽  
Vol 8 (8) ◽  
pp. 5240
Author(s):  
Ida Bagus Oka Keswara Putra ◽  
Ni Wayan Sri Suprapti
Keyword(s):  
Purchase Intention ◽  
Sampling Method ◽  
Sampling Methods ◽  
Brand Image ◽  
Total Sample ◽  
Purchase Intentions ◽  
National Origin ◽  
Behavioral Observations ◽  
Analysis Technique

This research was conducted in Denpasar City with a total sample of 110 samples. Determination of the sample using non-probability sampling method, namely purposive sampling. Methods of collecting data using non-behavioral observations and questionnaires. The analysis technique used is path analysis technique. Based on the results of the research conducted, it was found that perceptions of national origin had a positive and significant effect on brand image, this means that the better the perception of national origin of Oppo would improve the Oppo brand image. Perceptions of national origin have a positive and significant effect on purchase intentions. This shows consumers 'perceptions of perceptions of national origin influence consumers' buying intention towards Oppo smartphone products. Brand image has a positive and significant effect on purchase intention. This shows that the Oppo brand image has a significant influence on consumers' purchase intentions. Brand image is able to mediate the influence of perceptions of national origin on purchase intention, this means that the brand image mediates the influence of perceptions of national origin into the overall purchase intention. Keywords: perception of national origin, brand image, purchase intention    

scholarly journals Analisis Vegetasi Tumbuhan Herba di Hutan Lingkungan Kampus Unwira Penfui Kupang

2020 ◽  
Vol 5 (2) ◽  
pp. 57-62
Author(s):  
Imelda Tidora Sombo ◽  
Florentina Y. Sepe ◽  
Getrudis W. Nau ◽  
Maria Novita I. Buku ◽  
Aloysius Djalo
Keyword(s):  
Diversity Index ◽  
Sampling Point ◽  
Bidens Pilosa ◽  
Importance Value Index ◽  
Importance Value ◽  
Vegetation Diversity ◽  
Campus Environment ◽  
Herbal Plants ◽  
Index Value ◽  
Number Of Individuals

This study aims to determine the spread of herbal vegetation in the environment of the campus environment of UNWIRA Penfui Kupang, by applying vegetation parameters including density, relative density, frequency, relative frequency, dominance, relative dominance, Importance Value Index (INP), and Comparison Important Value (SDR). The method used in this study is the quadratic method, with the determination of the sampling point divided into two observation stations, based on open and sheltered areas with each station there are 5 observation plots with a size of 1x1 m2. The results of research conducted in the environment of the campus environment of UNWIRA Penfui Kupang found 7 types of herbal plants namely Solanum nigrum, Mussaenda frondosa, Oplismenus hirtellus, Amaranthus viridis, Eclipta L, Bidens pilosa, Imperata cylindrical and the composition of the highest number of individuals were Oplismenus hirtellus. The amount of diversity index value of basket grass plants (Oplismenus hirtellus) is 0.146 with a large amount of basket grass plants tend to be more stable compared to the other 6 plants found. Index value of vegetation diversity of herbaceous plants obtained is 0.782, so species diversity is lacking.

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